IcedID — Office (OOXML) / .DOC malware analysis

Static analysis result for SHA-256 bdf9c49b35844c8f…

MALICIOUS

Office (OOXML) / .DOC

34.3 KB Created: 2021-11-01 04:35:00 UTC Authoring application: Microsoft Office Word 16.0000 First seen: 2021-11-07
MD5: c6fbda212ee58f68d2fe4ff8690d97c7 SHA-1: d1616460aee95a4a48eb5f9807e65427055c8074 SHA-256: bdf9c49b35844c8f4206652e4b63947b5d4fe58911860dcc5590e663965fae91
202 Risk Score

Malware Insights

IcedID · confidence 95%

MITRE ATT&CK
T1059.005 Visual Basic T1059.003 Windows Command Shell T1204.002 Malicious File

The sample is identified as IcedID by ClamAV. The VBA macro contains a Document_Open subroutine which calls a function to execute a payload. The script reconstructs the command to execute 'explorer.exe' with a path derived from the document's keywords property, likely to download and execute a second-stage payload. The use of CreateObject and the Document_Open macro are common techniques for initial execution.

Heuristics 6

  • ClamAV: Doc.Downloader.IcedID-8ff0f02ff0876072-9950256-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Doc.Downloader.IcedID-8ff0f02ff0876072-9950256-0
  • Document_Open macro high OLE_VBA_DOCOPEN
    Document_Open macro
  • CreateObject call high OLE_VBA_CREATEOBJ
    CreateObject call
  • Suspicious extracted artifact high EXTRACTED_FILE_STATIC_TRIAGE
    One or more files extracted from inside this sample matched static suspicious-content checks such as script obfuscation, encoded payload blobs, packed data, or execution/download terms.
  • VBA project inside OOXML medium OOXML_VBA
    Document contains vbaProject.bin — VBA macros present
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL http://schemas.microsoft.com/office/word/2010/wordprocessingCanvas
    • http://schemas.microsoft.com/office/drawing/2014/chartex
    • http://schemas.microsoft.com/office/drawing/2015/9/8/chartex
    • http://schemas.openxmlformats.org/markup-compatibility/2006
    • http://schemas.openxmlformats.org/officeDocument/2006/relationships
    • http://schemas.openxmlformats.org/officeDocument/2006/math
    • http://schemas.microsoft.com/office/word/2010/wordprocessingDrawing
    • http://schemas.openxmlformats.org/drawingml/2006/wordprocessingDrawing
    • http://schemas.openxmlformats.org/wordprocessingml/2006/main
    • http://schemas.microsoft.com/office/word/2010/wordml
    • http://schemas.microsoft.com/office/word/2012/wordml
    • http://schemas.microsoft.com/office/word/2015/wordml/symex
    • http://schemas.microsoft.com/office/word/2010/wordprocessingGroup
    • http://schemas.microsoft.com/office/word/2010/wordprocessingInk
    • http://schemas.microsoft.com/office/word/2006/wordml
    • http://schemas.microsoft.com/office/word/2010/wordprocessingShape

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
macros.bas
12d5a5e33a2eaeee829543e14b6fa9206c9721e7c10359a1950134211ed23bc9		 vba-macro oletools.olevba.extract_macros (decoded VBA source from OOXML) 1029 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.
vbaProject_00.bin
1b68bdbe72c7cedad7ca88f8d78984bade070eba18158ba1a545a72b5d4bd455		 vba-project OOXML VBA project: word/vbaProject.bin 15360 bytes
Detection
ClamAV: No threats found
Obfuscation or payload: likely
Carved macro source contains an auto-exec entry point and execution/download terms.

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